Routers are the small box, with lots of blinking lights, that connects you to the internet. They have many names (eg: ADSL Modem, Cable Modem, WiFi Router) and take many forms. They are usually small boxes, sometimes with antennas, often white or blank. Usually consumers just plug them in, the router starts, it works, and that’s the last anyone thinks about them.

Unfortunately the default factory settings are only intended for easy installation and setup. The settings are meant to be changed to something more secure as part of the setup, though most people don’t do that.